<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<meta name="viewport" content="width=device-width, initial-scale=1">
		<title></title>
	</head>
	<style type="text/css">
		.content{
			padding: 300px;
			background-color: #9ACD32;
			height: 600px;
			border: 1px solid gray;
			width: 600px;
			margin: 100px auto;
			position: relative;
		}
		.inner{
			position: absolute;
			left: 0;
			top:0;
			bottom: 0;
			right: 0;
			margin: auto;
			height: 200px;
			width: 200px;
			background-color: #FF6945;
		}
	</style>
	<body>
		<div class="content">
			<div class="inner">
				
			</div>
		</div>
	</body>
</html>